My chickens free-range, so snake-proofing the coop is not possible - they just come through the doorway! My last word on the subject - I wonder if there would be such opposition to killing if these were rats we were talking about. Oh, no, don't kill it, relocate it! Any, and I mean any, predator of my chickens has to go. I am not into torture, and am an animal lover, but it is my duty to keep my chickens safe, so snakes, rats, birds, dogs, cats, etc., need to stay away or risk death by whatever means I have at hand. If it is your choice to relocate, so be it. I will not criticize you for that. I tried it and a few weeks later my newborn chicks died because of it. I have seen countless snakes on my property and let them live, just as long as they avoid the hen house.